Steel heads. Aluminum intake. Stock Holley carb (no lightweight bowls or billet blocks). I thought that the 318 bars would allow too much roll and cause fishtailing, also. I don't know if Hotchkis tailors their kits by engine/trans/rear combination. A small block aluminum head motor will be substantially lighter than a big block cast iron head piece. You would think that rear leafs and sway bars should change accordingly.